target/linux/bcm27xx/patches-5.15/950-0630-drm-vc4-hdmi-Move-clock-validation-to-its-own-functi.patch

   1 From ca4627ecd3f93cd28ba3ae75af44e28224989b6a Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Thu, 2 Dec 2021 16:58:17 +0100
   4 Subject: [PATCH] drm/vc4: hdmi: Move clock validation to its own
   5  function
   6
   7 Our code is doing the same clock rate validation in multiple instances.
   8 Let's create a helper to share the rate validation.
   9
  10 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_hdmi.c | 26 +++++++++++++++-----------
  13  1 file changed, 15 insertions(+), 11 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  17 @@ -1252,6 +1252,19 @@ static void vc4_hdmi_encoder_atomic_mode
  18         mutex_unlock(&vc4_hdmi->mutex);
  19  }
  20
  21 +static enum drm_mode_status
  22 +vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi,
  23 +                            unsigned long long clock)
  24 +{
  25 +       if (clock > vc4_hdmi->variant->max_pixel_clock)
  26 +               return MODE_CLOCK_HIGH;
  27 +
  28 +       if (vc4_hdmi->disable_4kp60 && clock > HDMI_14_MAX_TMDS_CLK)
  29 +               return MODE_CLOCK_HIGH;
  30 +
  31 +       return MODE_OK;
  32 +}
  33 +
  34  #define WIFI_2_4GHz_CH1_MIN_FREQ       2400000000ULL
  35  #define WIFI_2_4GHz_CH1_MAX_FREQ       2422000000ULL
  36
  37 @@ -1296,10 +1309,7 @@ static int vc4_hdmi_encoder_atomic_check
  38         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
  39                 pixel_rate = pixel_rate * 2;
  40
  41 -       if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
  42 -               return -EINVAL;
  43 -
  44 -       if (vc4_hdmi->disable_4kp60 && (pixel_rate > HDMI_14_MAX_TMDS_CLK))
  45 +       if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, pixel_rate) != MODE_OK)
  46                 return -EINVAL;
  47
  48         vc4_state->pixel_rate = pixel_rate;
  49 @@ -1319,13 +1329,7 @@ vc4_hdmi_encoder_mode_valid(struct drm_e
  50              (mode->hsync_end % 2) || (mode->htotal % 2)))
  51                 return MODE_H_ILLEGAL;
  52
  53 -       if ((mode->clock * 1000) > vc4_hdmi->variant->max_pixel_clock)
  54 -               return MODE_CLOCK_HIGH;
  55 -
  56 -       if (vc4_hdmi->disable_4kp60 && vc4_hdmi_mode_needs_scrambling(mode))
  57 -               return MODE_CLOCK_HIGH;
  58 -
  59 -       return MODE_OK;
  60 +       return vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode->clock * 1000);
  61  }
  62
  63  static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {